Apple Newton Programmer’s Newton 2.0 (for Newton 2.0) - Manual (Page 766)

C H A P T E R 2 1
Routing Interface
21-18 Using Routing
Creating a Print Format 21
You create a print format by using protoPrintFormat . This proto is required
for routing formats with a 'view data type, such as views that you would print or
fax. This proto format is actually a view template, which displays the target object
visually. The data to be displayed is laid out as child views of the
protoPrintFormat view.
Here is an example of a format based on this proto:
// in NTK you create a new layout for view formats
MyPrintFormat := {
_proto: protoPrintFormat,
symbol: '|myPrintFormat:SIG|,
title: "PrintIt",
ViewSetupChildrenScript: func() begin
// construct child views for first page here
end,
PrintNextPageScript: func() begin
nil;
// construct child views for next page here
end,
};
For more information about the slots and methods provided by this proto, see
“Routing Format Protos” (page 18-9) in Newton Programmer’s Reference.
Topics unique to protoPrintFormat are discussed in the following subsections.
Page Layout 21
The view based on the protoPrintFormat proto is automatically sized (in the
ViewSetupFormScript method) to fit the dimensions of a page on the output
device to which it is being routed. Do not change the values of the viewBounds
or viewJustify slots in the print format view.
You can increase the margins used on the page by setting the margins slot. Set
this slot to a bounds rectangle frame, like this:
{left: 25, top: 20, right: 25, bottom: 30}
Each slot in this frame is interpreted as an inset from each edge of the printable
area of the paper in pixels. You must specify only non-negative values, to make
sure that you don’t print off the page. The default value of the
margins slot is
{left:0, top:0, right:0, bottom:0} .
Also, you can control the orientation of the data on the paper by setting the
orientation slot. Specify a symbol indicating whether to use the paper vertically